Last data update: Mar 21, 2025. (Total: 48935 publications since 2009)
Records 1-26 (of 26 Records) |
Query Trace: Horner L[original query] |
---|
Antibodies against egg- and cell-grown influenza A(H3N2) viruses in adults hospitalized during the 2017-2018 season (preprint)
Levine MZ , Martin ET , Petrie JG , Lauring AS , Holiday C , Jefferson S , Fitzsimmons WJ , Johnson E , Ferdinands JM , Monto AS . bioRxiv 2018 439471 Background The 2017-2018 US influenza season was severe with low vaccine effectiveness. Circulating A(H3N2) viruses from multiple genetic groups were antigenically similar to cell-grown vaccine strains. However, most influenza vaccines are egg-propagated.Methods Serum was collected shortly after illness onset from 15 PCR confirmed A(H3N2) infected cases and 15 uninfected (controls) hospitalized adults enrolled in an influenza vaccine effectiveness study.Geometric mean titers against egg- and cell-grown A/Hong Kong/4801/2014 A(H3N2) vaccine strains and representative circulating viruses (including A/Washington/16/2017) were determined by microneutralization (MN) assays. Independent effects of strain-specific titers on susceptibility were estimated by logistic regression.Results MN titers against egg-A/Hong Kong were significantly higher among those who were vaccinated (MN GMT: 173 vs 41; P = 0.01). However, antibody titers to cell-grown viruses were much lower in all individuals (P>0.05) regardless of vaccination. In unadjusted models, a 2-fold increase in MN titers against egg-A/Hong Kong was not significantly protective against infection (29% reduction; p=0.09), but a similar increase in cell-A/Washington titer (3C.2a2) was protective (60% reduction; p=0.02). A similar increase in egg-A/Hong Kong titer was not significantly associated with odds of infection when adjusting for MN titers against A/Washington (15% reduction; P=0.61). A 54% reduction of odds of infection was observed with a 2-fold increase in A/Washington (not significant; P=0.07), adjusted for egg-A/Hong Kong titer.Conclusion Although individuals vaccinated in 2017-2018 had high antibody titers against the egg-adapted vaccine strain, antibody responses to cell-grown circulating viruses may not be sufficient to provide protection, likely due to egg-adaptation in the vaccine.We thank Maryna Eichelberger, Hongquan Wan, Jin Gao, and Laura Couzens (Food and Drug Administration) for technical support and providing reassortant influenza viruses for use in the enzyme-linked lectin assays. St Jude Children’s Research Hospital provided plasmids that were used to generate these reassortant influenza viruses. We thank Mrs F Liaini Gross, Lauren Horner and Makeda Kay from Influenza Division, Centers for Disease Control and Prevention for technical support for virus propagation and specimen management. |
Multiplex Detection of Antibody Landscapes to SARS-CoV-2/Influenza/Common Human Coronaviruses Following Vaccination or Infection with SARS-CoV-2 and Influenza.
Li ZN , Liu F , Jefferson S , Horner L , Carney P , Johnson MDL , King JP , Martin ET , Zimmerman RK , Wernli K , Gaglani M , Thompson M , Flannery B , Stevens J , Tumpey T , Levine MZ . Clin Infect Dis 2022 75 S271-S284 BACKGROUND: SARS-CoV-2 and influenza viruses continue to co-circulate, representing two major public health threats from respiratory infections with similar clinical presentations. SARS-CoV-2 and influenza vaccines can also now be co-administered. However, data on antibody responses to SARS-CoV-2 and influenza co-infection, and vaccine co-administration remains limited. METHODS: We developed a 41-plex antibody immunity assay that can simultaneously characterize antibody landscapes to SARS-CoV-2/influenza/common human coronaviruses. We analyzed sera from 840 individuals (11-93 years), including sera from reverse transcription polymerase chain reaction (RT-PCR) confirmed SARS-CoV-2 positive (n = 218) and negative (n = 120) cases, paired sera from SARS-CoV-2 vaccination (n = 29) and infection (n = 11), and paired sera from influenza vaccination (n = 56) and RT-PCR confirmed influenza infection (n = 158) cases. Lastly, we analyzed sera collected from 377 individual that exhibited acute respiratory illness (ARI) in 2020. RESULTS: This 41-plex assay has high sensitivity and specificity in detecting SARS-CoV-2 infections. It differentiated SARS-CoV-2 vaccination (antibody responses only to spike protein) from infection (antibody responses to both spike and nucleoprotein). No cross-reactive antibodies were detected to SARS-CoV-2 from influenza vaccination and infection, and vice versa, suggesting no interaction between SARS-CoV-2 and influenza antibody responses. However, cross-reactive antibodies were detected between spike proteins of SARS-CoV-2 and common human coronaviruses that were removed by serum adsorption. Among 377 individual who exhibited ARI in 2020, 129 were influenza positive, none had serological evidence of SARS-CoV-2/influenza co-infections. CONCLUSIONS: Multiplex detection of antibody landscapes can provide in-depth analysis of the antibody protective immunity to SARS-CoV-2 in the context of other respiratory viruses including influenza. |
Serologic and Cytokine Signatures in Children With Multisystem Inflammatory Syndrome and Coronavirus Disease 2019.
Lapp SA , Abrams J , Lu AT , Hussaini L , Kao CM , Hunstad DA , Rosenberg RB , Zafferani MJ , Ede KC , Ballan W , Laham FR , Beltran Y , Hsiao HM , Sherry W , Jenkins E , Jones K , Horner A , Brooks A , Bryant B , Meng L , Hammett TA , Oster ME , Bamrah-Morris S , Godfred-Cato S , Belay E , Chahroudi A , Anderson EJ , Jaggi P , Rostad CA . Open Forum Infect Dis 2022 9 (3) ofac070 BACKGROUND: The serologic and cytokine responses of children hospitalized with multisystem inflammatory syndrome (MIS-C) vs coronavirus disease 2019 (COVID-19) are poorly understood. METHODS: We performed a prospective, multicenter, cross-sectional study of hospitalized children who met the Centers for Disease Control and Prevention case definition for MIS-C (n = 118), acute COVID-19 (n = 88), or contemporaneous healthy controls (n = 24). We measured severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike receptor-binding domain (RBD) immunoglobulin G (IgG) titers and cytokine concentrations in patients and performed multivariable analysis to determine cytokine signatures associated with MIS-C. We also measured nucleocapsid IgG and convalescent RBD IgG in subsets of patients. RESULTS: Children with MIS-C had significantly higher SARS-CoV-2 RBD IgG than children with acute COVID-19 (median, 2783 vs 146; P < .001), and titers correlated with nucleocapsid IgG. For patients with MIS-C, RBD IgG titers declined in convalescence (median, 2783 vs 1135; P = .010) in contrast to patients with COVID-19 (median, 146 vs 4795; P < .001). MIS-C was characterized by transient acute proinflammatory hypercytokinemia, including elevated levels of interleukin (IL) 6, IL-10, IL-17A, and interferon gamma (IFN-γ). Elevation of at least 3 of these cytokines was associated with significantly increased prevalence of prolonged hospitalization ≥8 days (prevalence ratio, 3.29 [95% CI, 1.17-9.23]). CONCLUSIONS: MIS-C was associated with high titers of SARS-CoV-2 RBD IgG antibodies and acute hypercytokinemia with IL-6, IL-10, IL-17A, and IFN-γ. |
Assessing rodents as carriers of pathogenic Leptospira species in the U.S. Virgin Islands and their risk to animal and public health.
Hamond C , Browne AS , deWilde LH , Hornsby RL , LeCount K , Anderson T , Stuber T , Cranford HM , Browne SK , Blanchard G , Horner D , Taylor ML , Evans M , Angeli NF , Roth J , Bisgard KM , Salzer JS , Schafer IJ , Ellis BR , Alt DP , Schlater L , Nally JE , Ellis EM . Sci Rep 2022 12 (1) 1132 ![]() Leptospirosis is a global zoonotic disease caused by pathogenic bacteria of the genus Leptospira. We sought to determine if rodents in U.S. Virgin Islands (USVI) are carriers of Leptospira. In total, 140 rodents were sampled, including 112 Mus musculus and 28 Rattus rattus. A positive carrier status was identified for 64/140 (45.7%); 49 (35.0%) were positive by dark-field microscopy, 60 (42.9%) by culture, 63 (45.0%) by fluorescent antibody testing, and 61 (43.6%) by real-time polymerase chain reaction (rtPCR). Molecular typing indicated that 48 isolates were L. borgpetersenii and 3 were L. kirschneri; the remaining nine comprised mixed species. In the single culture-negative sample that was rtPCR positive, genotyping directly from the kidney identified L. interrogans. Serotyping of L. borgpetersenii isolates identified serogroup Ballum and L. kirschneri isolates as serogroup Icterohaemorrhagiae. These results demonstrate that rodents are significant Leptospira carriers and adds to understanding the ecoepidemiology of leptospirosis in USVI. |
Mongooses (Urva auropunctata) as reservoir hosts of Leptospira species in the United States Virgin Islands, 2019-2020.
Cranford HM , Browne AS , LeCount K , Anderson T , Hamond C , Schlater L , Stuber T , Burke-France VJ , Taylor M , Harrison CJ , Matias KY , Medley A , Rossow J , Wiese N , Jankelunas L , de Wilde L , Mehalick M , Blanchard GL , Garcia KR , McKinley AS , Lombard CD , Angeli NF , Horner D , Kelley T , Worthington DJ , Valiulis J , Bradford B , Berentsen A , Salzer JS , Galloway R , Schafer IJ , Bisgard K , Roth J , Ellis BR , Ellis EM , Nally JE . PLoS Negl Trop Dis 2021 15 (11) e0009859 ![]() During 2019-2020, the Virgin Islands Department of Health investigated potential animal reservoirs of Leptospira spp., the bacteria that cause leptospirosis. In this cross-sectional study, we investigated Leptospira spp. exposure and carriage in the small Indian mongoose (Urva auropunctata, syn: Herpestes auropunctatus), an invasive animal species. This study was conducted across the three main islands of the U.S. Virgin Islands (USVI), which are St. Croix, St. Thomas, and St. John. We used the microscopic agglutination test (MAT), fluorescent antibody test (FAT), real-time polymerase chain reaction (lipl32 rt-PCR), and bacterial culture to evaluate serum and kidney specimens and compared the sensitivity, specificity, positive predictive value, and negative predictive value of these laboratory methods. Mongooses (n = 274) were live-trapped at 31 field sites in ten regions across USVI and humanely euthanized for Leptospira spp. testing. Bacterial isolates were sequenced and evaluated for species and phylogenetic analysis using the ppk gene. Anti-Leptospira spp. antibodies were detected in 34% (87/256) of mongooses. Reactions were observed with the following serogroups: Sejroe, Icterohaemorrhagiae, Pyrogenes, Mini, Cynopteri, Australis, Hebdomadis, Autumnalis, Mankarso, Pomona, and Ballum. Of the kidney specimens examined, 5.8% (16/270) were FAT-positive, 10% (27/274) were culture-positive, and 12.4% (34/274) were positive by rt-PCR. Of the Leptospira spp. isolated from mongooses, 25 were L. borgpetersenii, one was L. interrogans, and one was L. kirschneri. Positive predictive values of FAT and rt-PCR testing for predicting successful isolation of Leptospira by culture were 88% and 65%, respectively. The isolation and identification of Leptospira spp. in mongooses highlights the potential role of mongooses as a wildlife reservoir of leptospirosis; mongooses could be a source of Leptospira spp. infections for other wildlife, domestic animals, and humans. |
Time trends in emergency department use among adults with intellectual and developmental disabilities
Horner-Johnson W , Lindner S , Levy A , Hall J , Kurth N , Garcia E , Frame A , Phillips K , Momany E , Lurie M , Shin Y , Lauer E , Kunte P , Silverstein R , Okoro C , McDermott S . Disabil Health J 2021 15 (2) 101225 BACKGROUND: Emergency Department (ED) visits are common among adults with intellectual and developmental disabilities (IDD). However, little is known about how ED use has varied over time in this population, or how it has been affected by recent Medicaid policy changes. OBJECTIVE: To examine temporal trends in ED use among adult Medicaid members with IDD in eight states that ranged in the extent to which they had implemented state-level Medicaid policy changes that might affect ED use. METHODS: We conducted repeated cross-sectional analyses of 2010-2016 Medicaid claims data. Quarterly analyses included adults ages 18-64 years with IDD (identified by diagnosis codes) who were continuously enrolled in Medicaid for the past 12 months. We assessed change in number of ED visits per 1000 member months from 2010 to 2016 overall and interacted with state level policy changes such as Medicaid expansion. RESULTS: States with no Medicaid expansion experienced an increase in ED visits (linear trend coefficient: 1.13, p < 0.01), while states operating expansion via waiver had a much smaller (non-significant) increase, and states with ACA-governed expansion had a decrease in ED visits (linear trend coefficient: 1.17, p < 0.01). Other policy changes had limited or no association with ED visits. CONCLUSIONS: Medicaid expansion was associated with modest reduction or limited increase in ED visits compared to no expansion. We found no consistent decrease in ED visits in association with other Medicaid policy changes. |
Determination of freedom-from-rabies for small Indian mongoose populations in the United States Virgin Islands, 2019-2020
Browne AS , Cranford HM , Morgan CN , Ellison JA , Berentsen A , Wiese N , Medley A , Rossow J , Jankelunas L , McKinley AS , Lombard CD , Angeli NF , Kelley T , Valiulus J , Bradford B , Burke-France VJ , Harrison CJ , Guendel I , Taylor M , Blanchard GL , Doty JB , Worthington DJ , Horner D , Garcia KR , Roth J , Ellis BR , Bisgard KM , Wallace R , Ellis EM . PLoS Negl Trop Dis 2021 15 (7) e0009536 Mongooses, a nonnative species, are a known reservoir of rabies virus in the Caribbean region. A cross-sectional study of mongooses at 41 field sites on the US Virgin Islands of St. Croix, St. John, and St. Thomas captured 312 mongooses (32% capture rate). We determined the absence of rabies virus by antigen testing and rabies virus exposure by antibody testing in mongoose populations on all three islands. USVI is the first Caribbean state to determine freedom-from-rabies for its mongoose populations with a scientifically-led robust cross-sectional study. Ongoing surveillance activities will determine if other domestic and wildlife populations in USVI are rabies-free. |
Kaposi Sarcoma Incidence, Burden and Prevalence in United States People with HIV, 2000-2015
Peprah S , Engels EA , Horner MJ , Monterosso A , Hall HI , Johnson AS , Pfeiffer RM , Shiels MS . Cancer Epidemiol Biomarkers Prev 2021 30 (9) 1627-1633 BACKGROUND: The introduction of combination antiretroviral therapy (cART) has led to a significant reduction in Kaposi sarcoma (KS) incidence among people with HIV (PWH). However, it is unclear if incidence has declined similarly across key demographic and HIV transmission groups and the annual number of incident and prevalent KS cases remains unquantified. METHODS: Using population-based registry linkage data, we evaluated temporal trends in KS incidence using adjusted Poisson regression. Incidence and prevalence estimates were applied to CDC HIV surveillance data, to obtain the number of incident (2008-2015) and prevalent (2015) cases in the United States. RESULTS: Among PWH, KS rates were elevated 521-fold (95% confidence intervals [CI]: 498, 536) compared to the general population and declined from 109 per 100,000 person-years in 2000 to 47 per 100,000 person-years in 2015, at an annual percentage change of -6%. Rates declined substantially (p-trend<0∙005) across all demographic and HIV transmission groups. Of the 5,306 new cases estimated between 2008 and 2015, 89% occurred among men who have sex with men. At the end of 2015, 1,904 PWH (0.20%) had been diagnosed with KS in the previous 5 years. CONCLUSIONS: A consistent gradual decline in KS incidence has occurred among PWH in the United States during the current cART era. This decrease is uniform across key demographic and HIV transmission groups, though rates remain elevated relative to the general population. IMPACT: Continued efforts to control HIV through early cART initiation and retention in care need to be maintained and possibly expanded to sustain declines. |
Chlamydial Pgp3 seropositivity and population attributable fraction among women with tubal factor infertility
Anyalechi GE , Hong J , Kirkcaldy RD , Wiesenfeld HC , Horner P , Wills GS , McClure MO , Hammond KR , Haggerty CL , Kissin DM , Hook EW3rd , Steinkampf MP , Bernstein K , Geisler WM . Sex Transm Dis 2021 49 (8) 527-533 BACKGROUND: Chlamydial infection is associated with tubal factor infertility (TFI); however, assessment of prior chlamydial infection and TFI is imperfect. We previously evaluated a combination of serological assays for association with TFI. We now describe the chlamydial contribution to TFI using a newer Chlamydia trachomatis Pgp3 enhanced serological (Pgp3) assay. METHODS: In our case-control study of women 19-42 years old with hysterosalpingogram-diagnosed TFI (cases) and non-TFI (controls) in two U.S. infertility clinics, we assessed possible associations and effect modifiers between Pgp3 seropositivity and TFI using adjusted odds ratios (aOR) with 95% confidence intervals (CI) stratified by race. We then estimated the adjusted chlamydia population attributable fraction (aPAF) with 95% CI of TFI. RESULTS: All black (n=107) and 618 of 620 non-black women had Pgp3 results. Pgp3 seropositivity was 25.9% (19.3-33.8%) for non-black cases, 15.2% (12.3-18.7%) for non-black controls, 66.0% (95% CI 51.7-77.8%) for black cases, and 71.7% (59.2-81.5%) for black controls. Among 476 non-black women without endometriosis (n=476), Pgp3 was associated with TFI (aOR 2.6 [1.5-4.4]), adjusting for clinic, age, and income; chlamydia TFI aPAF was 19.8% (95% CI 7.7-32.2%) in these women. Pgp3 positivity was not associated with TFI among non-black women with endometriosis nor among black women (regardless of endometriosis). CONCLUSIONS: Among non-black infertile women without endometriosis in these clinics, 20% of TFI was attributed to chlamydia. Better biomarkers are needed to estimate chlamydia TFI PAF, especially in black women. |
High Pgp3 Chlamydia trachomatis seropositivity, pelvic inflammatory disease and infertility among women, National Health and Nutrition Examination Survey, United States, 2013-2016
Anyalechi GE , Hong J , Danavall DC , Martin DL , Gwyn SE , Horner PJ , Raphael BH , Kirkcaldy RD , Kersh EN , Bernstein KT . Clin Infect Dis 2021 73 (8) 1507-1516 BACKGROUND: Chlamydia trachomatis causes pelvic inflammatory disease (PID) and tubal infertility. Pgp3 antibody (Pgp3Ab) detects prior chlamydial infections. We evaluated for an association of high chlamydial seropositivity with sequelae using a Pgp3Ab multiplex bead array (Pgp3AbMBA). METHODS: We performed chlamydia Pgp3AbMBA on sera from women 18-39 years old participating in the 2013-2016 National Health and Nutrition Examination Survey (NHANES) with urine chlamydia nucleic acid amplification test results. High chlamydial seropositivity was defined as a median fluorescence intensity (MFI ≥ 50,000; low-positive was MFI > 551-<50,000. Weighted US population high-positive, low-positive, and negative Pgp3Ab chlamydia seroprevalence and 95% confidence intervals (95% CI) were compared for women with chlamydial infection, self-reported PID, and infertility. RESULTS: Of 2,339 women aged 18-39 years, 1,725 (73.7%) had sera and 1,425 were sexually experienced. Overall, 104 women had high positive Pgp3Ab (5.4% [95% CI 4.0-7.0] of US women); 407 had low positive Pgp3Ab (25.1% [95% CI 21.5-29.0]), and 914 had negative Pgp3Ab (69.5% [95% CI 65.5-73.4]).Among women with high Pgp3Ab, infertility prevalence was 2.0 (95% CI 1.1-3.7) times higher than among Pgp3Ab-negative women (19.6% [95% CI 10.5-31.7] versus 9.9% [95% CI 7.7-12.4]). For women with low Pgp3Ab, PID prevalence was 7.9% (95% CI 4.6-12.6) compared to 2.3% (95% CI 1.4-3.6) in negative Pgp3Ab. CONCLUSIONS: High chlamydial Pgp3Ab seropositivity was associated with infertility although small sample size limited evaluation of an association of high seropositivity with PID. In infertile women, Pgp3Ab may be a marker of prior chlamydial infection. |
Declining chlamydia and gonorrhea diagnoses among pregnant women in South Carolina, 2008-2018
Lazenby GB , Savage AH , Horner G , Richmond J , Peterman TA . Sex Transm Dis 2020 48 (3) 141-144 BACKGROUND: Reported U.S. cases of chlamydia and gonorrhea have increased since 2000, while studies in select populations suggest the prevalence of these diseases has decreased. We sought to determine if these diagnoses are increasing among pregnant women delivering at our center. METHODS: This is a retrospective study of women delivering at least one infant > 18 weeks gestation at the Medical University of South Carolina over eleven years (2008-2018). Using the perinatal information system, we collected maternal race, age, insurer, and chlamydia and gonorrhea screening results during the pregnancy of record. Cochran-Armitage trend analyses were performed to evaluate trends in these diagnoses by delivery year for all women and for age/race subgroups. RESULTS: During the study period, there were 24,807 deliveries. The median age of women was 28 years (IQR 23-32). Five percent (5.0%) of women were diagnosed with chlamydia and 1.2% with gonorrhea. The percent of women diagnosed decreased for both chlamydia (9.6% to 3.4%) and gonorrhea (2.5% to 1.1%) (p <0.001 trend analyses for both). A higher percentage of Black women had chlamydia and gonorrhea and both diagnoses declined over time, chlamydia 17.4% to 6.9%, p<0.0001 and gonorrhea 5.8% to 2.1%, p< 0.0001. In a sub-analysis of race and age, Black women < 25 experienced the most significant decline in chlamydia diagnoses (p<0.0001). CONCLUSIONS: We observed declining diagnoses of chlamydia and gonorrhea among pregnant women in our center. Although Black women delivering were more likely to have either diagnoses, they experienced a significant decline in both chlamydia and gonorrhea over time. |
Ten questions concerning the implications of carpet on indoor chemistry and microbiology
Haines SR , Adams RI , Boor BE , Bruton TA , Downey J , Ferro AR , Gall E , Green BJ , Hegarty B , Horner E , Jacobs DE , Lemieux P , Misztal PK , Morrison G , Perzanowski M , Reponen T , Rush RE , Virgo T , Alkhayri C , Bope A , Cochran S , Cox J , Donohue A , May AA , Nastasi N , Nishioka M , Renninger N , Tian Y , Uebel-Niemeier C , Wilkinson D , Wu T , Zambrana J , Dannemiller KC . Build Environ 2020 170 1-16 Carpet and rugs currently represent about half of the United States flooring market and offer many benefits as a flooring type. How carpets influence our exposure to both microorganisms and chemicals in indoor environments has important health implications but is not well understood. The goal of this manuscript is to consolidate what is known about how carpet impacts indoor chemistry and microbiology, as well as to identify the important research gaps that remain. After describing the current use of carpet indoors, questions focus on five specific areas: 1) indoor chemistry, 2) indoor microbiology, 3) resuspension and exposure, 4) current practices and future needs, and 5) sustainability. Overall, it is clear that carpet can influence our exposures to particles and volatile compounds in the indoor environment by acting as a direct source, as a reservoir of environmental contaminants, and as a surface supporting chemical and biological transformations. However, the health implications of these processes are not well known, nor how cleaning practices could be optimized to minimize potential negative impacts. Current standards and recommendations focus largely on carpets as a primary source of chemicals and on limiting moisture that would support microbial growth. Future research should consider enhancing knowledge related to the impact of carpet in the indoor environment and how we might improve the design and maintenance of this common material to reduce our exposure to harmful contaminants while retaining the benefits to consumers. |
Landscape plant selection criteria for the allergic patient
Green BJ , Levetin E , Horner WE , Codina R , Barnes CS , Filley WV . J Allergy Clin Immunol Pract 2018 6 (6) 1869-1876 Patients with pollen-related allergies are concerned about the species within their landscape that provoke their symptoms. Allergists are often asked for guidance but few information sources are available to aid patients in the recognition of allergenic plants and strategies to avoid personal exposure to them. Landscaping and horticultural workers also have few reliable guidance references, and what is available usually extols the virtues of the plants rather than their negative features. The aim of this article was to provide the results of the Landscape Allergen Working Group that was formed by the AAAAI Aerobiology Committee, which aimed to fill these existing knowledge gaps and develop guidance on producing a low-allergenic landscape. Within the context that complete pollen avoidance is unrealistic, the workgroup introduces selection criteria, avoidance strategies, and guidance on low-allergenic plants that could be selected by patients to reduce the overall pollen burden in their landscape environment. Specific focus is placed on entomophilous plants, which require insects as dispersal vectors and generally produce lower quantities of pollen, compared with anemophilous (wind-pollinated) species. Other biological hazards that can be encountered while performing landscaping activities are additionally reviewed and avoidance methods presented with the aim of protecting gardeners, and workers in the landscape and horticulture industries. The guidance presented in this article will ultimately be a helpful resource for the allergist and assist in engaging patients who are seeking to reduce the burden of allergen in their landscape environment. |
Advancing the public health applications of Chlamydia trachomatis serology
Woodhall SC , Gorwitz RJ , Migchelsen SJ , Gottlieb SL , Horner PJ , Geisler WM , Winstanley C , Hufnagel K , Waterboer T , Martin DL , Huston WM , Gaydos CA , Deal C , Unemo M , Dunbar JK , Bernstein K . Lancet Infect Dis 2018 18 (12) e399-e407 Genital Chlamydia trachomatis infection is the most commonly diagnosed sexually transmitted infection. Trachoma is caused by ocular infection with C trachomatis and is the leading infectious cause of blindness worldwide. New serological assays for C trachomatis could facilitate improved understanding of C trachomatis epidemiology and prevention. C trachomatis serology offers a means of investigating the incidence of chlamydia infection and might be developed as a biomarker of scarring sequelae, such as pelvic inflammatory disease. Therefore, serological assays have potential as epidemiological tools to quantify unmet need, inform service planning, evaluate interventions including screening and treatment, and to assess new vaccine candidates. However, questions about the performance characteristics and interpretation of C trachomatis serological assays remain, which must be addressed to advance development within this field. In this Personal View, we explore the available information about C trachomatis serology and propose several priority actions. These actions involve development of target product profiles to guide assay selection and assessment across multiple applications and populations, establishment of a serum bank to facilitate assay development and evaluation, and development of technical and statistical methods for assay evaluation and analysis of serological findings. The field of C trachomatis serology will benefit from collaboration across the public health community to align technological developments with their potential applications. |
Both immune priming and egg-adaptation in the vaccine influence antibody responses to circulating A(H1N1)pdm09 viruses following influenza vaccination in adults
Liu F , Tzeng WP , Horner L , Kamal RP , Tatum HR , Blanchard EG , Xu X , York I , Tumpey TM , Katz JM , Lu X , Levine MZ . J Infect Dis 2018 218 (10) 1571-1581 Background: Although ferret antisera used in influenza surveillance did not detect antigenic drift of A(H1N1)pdm09 viruses during 2015-16 season, low vaccine effectiveness was reported in adults. We investigated the immune basis of low responses to circulating A(H1N1)pdm09 viruses following vaccination. Methods: Over 300 paired adult (18-49 yrs) pre and post-vaccination sera collected in 6 seasons (2010-11 to 2015-16) were analyzed by hemagglutination inhibition assays to evaluate the antibody responses to thirteen A(H1N1) viruses circulated from 1977 to 2016. Microneutralization and serum adsorption assays were used to verify 163K- and 223R-specificity of antibodies. Results: Individual antibody profiles to A(H1N1) viruses revealed three priming patterns: USSR/77-, TW/86- or NC/99-priming. Over 20% of adults had reduced titers to cell-propagated circulating 6B.1 and 6B.2 A(H1N1)pdm09 viruses compared to the A/California/07/2009 vaccine virus X-179A. Significantly reduced antibody reactivity to circulating viruses bearing K163Q was only observed in USSR/77-primed cohort, whereas significantly lower reactivity caused by egg-adapted Q223R change was detected across all 3 cohorts. Conclusion: Both 163K-specificity driven by immune priming and 223R-specificity from egg-adapted changes in the vaccine contributed to low responses to circulating A(H1N1)pdm09 viruses following vaccination. Our study highlights the need to incorporate human serology in influenza surveillance and vaccine strain selection. |
Quality-adjusted life years (QALY) for 15 chronic conditions and combinations of conditions among US adults aged 65 and older
Jia H , Lubetkin EI , Barile JP , Horner-Johnson W , DeMichele K , Stark DS , Zack MM , Thompson WW . Med Care 2018 56 (8) 740-746 BACKGROUND: Although the life expectancy for the US population has increased, a high proportion of this population has lived with >/=1 chronic conditions. We have quantified the burden of disease associated with 15 chronic conditions and combinations of conditions by estimating quality-adjusted life years (QALYs) for older US adults. RESEARCH DESIGN: Data were from the Medicare Health Outcomes Survey Cohort 15 (baseline survey in 2012, follow-up survey 2014, with mortality follow-up through January 31, 2015). We included individuals aged 65 years and older (n=96,481). We estimated mean QALY throughout the remainder of the lifetime according to the occurrence of these conditions. RESULTS: The age-adjusted QALY was 5.8 years for men and 7.8 years for women. Over 90% respondents reported at least 1 condition and 72% reported multiple conditions. Respondents with depression and congestive heart failure had the lowest age-adjusted QALY (1.1-1.5 y for men and 1.5-2.2 y for women), whereas those with hypertension, arthritis, and sciatica had higher QALY (4.2-5.4 and 6.4-7.2 y, respectively). Having either depression or congestive heart failure and any 1 or 2 of the other 13 conditions was associated with the lowest QALY among the possible dyads and triads of chronic conditions. Dyads and triads with hypertension or arthritis were more prevalent, but had higher QALY. CONCLUSIONS: Understanding the burden of disease for common chronic conditions and for combinations of these conditions is useful for delivering high-quality primary care that could be tailored for individuals with combinations of chronic conditions. |
Measurement characteristics for two health-related quality of life measures in older adults: The SF-36 and the CDC Healthy Days items
Barile JP , Horner-Johnson W , Krahn G , Zack M , Miranda D , DeMichele K , Ford D , Thompson WW . Disabil Health J 2016 9 (4) 567-74 BACKGROUND: The Short Form Health Survey (SF-36) and the Centers for Disease Control and Prevention (CDC) Healthy Days items are well known measures of health-related quality of life. The validity of the SF-36 for older adults and those with disabilities has been questioned. OBJECTIVE: Assess the extent to which the SF-36 and the Centers for Disease Control and Prevention (CDC) Healthy Days items measure the same aspects of health; whether the SF-36 and the CDC unhealthy days items are invariant across gender, functional status, or the presence of chronic health conditions of older adults; and whether each of the SF-36's eight subscales is independently associated with the CDC Healthy Days items. METHODS: We analyzed data from 66,269 adult Medicare advantage members age 65 and older. We used confirmatory factor analyses and regression modeling to test associations between the CDC Healthy Days items and subscales of the SF-36. RESULTS: The CDC Healthy Days items were associated with the SF-36 global measures of physical and mental health. The CDC physically unhealthy days item was associated with the SF-36 subscales for bodily pain, physical role limitations, and general health, while the CDC mentally unhealthy days item was associated with the SF-36 subscales for mental health, emotional role limitations, vitality and social functioning. The SF-36 physical functioning subscale was not independently associated with either of the CDC Healthy Days items. CONCLUSIONS: The CDC Healthy Days items measure similar domains as the SF-36 but appear to assess HRQOL without regard to limitations in functioning. |
Procedures to assist health care providers to determine when home assessments for potential mold exposure are warranted
Chew GL , Horner WE , Kennedy K , Grimes C , Barnes CS , Phipatanakul W , Larenas-Linnemann D , Miller JD . J Allergy Clin Immunol Pract 2016 4 (3) 417-422 e2 Drawing evidence from epidemiology and exposure assessment studies and recommendations from expert practice, we describe a process to guide health care providers helping their patients who present with symptoms that might be associated with living in damp housing. We present the procedures in the form of a guided 2-part interview. The first part has 5 questions that triage the patient toward a more detailed questionnaire that reflects features of housing conditions known to be reliably associated with exposures to mold and dampness contaminants. We chose the questions based on the conditions associated with moisture problems in homes across the United States and Canada. The goal is to facilitate the clinician's effort to help patients reduce exposure to environmental triggers that elicit symptoms to better manage their disease. |
Congenital rubella syndrome in child of woman without known risk factors, New Jersey, USA
Pitts SI , Wallace GS , Montana B , Handschur EF , Meislich D , Sampson AC , Canuso S , Horner J , Barskey AE , Abernathy ES , Icenogle JP . Emerg Infect Dis 2014 20 (2) 307-9 We report a case of congenital rubella syndrome in a child born to a vaccinated New Jersey woman who had not traveled internationally. Although rubella and congenital rubella syndrome have been eliminated from the United States, clinicians should remain vigilant and immediately notify public health authorities when either is suspected. |
Pap, mammography, and clinical breast examination screening among women with disabilities: a systematic review
Andresen EM , Peterson-Besse JJ , Krahn GL , Walsh ES , Horner-Johnson W , Iezzoni LI . Womens Health Issues 2013 23 (4) e205-14 BACKGROUND: Research has found some disparities between U.S. women with and without disabilities in receiving clinical preventive services. Substantial differences may also exist within the population of women with disabilities. The current study examined published research on Pap smears, mammography, and clinical breast examinations across disability severity levels among women with disabilities. METHODS: Informed by an expert panel, we followed guidelines for systematic literature reviews and searched MEDLINE, PsycINFO, and Cinahl databases. We also reviewed in-depth four disability- or preventive service-relevant journals. Two reviewers independently extracted data from all selected articles. FINDINGS: Five of 74 reviewed publications of met all our inclusion criteria and all five reported data on Pap smears, mammography, and clinical breast examination. Articles classified disability severity groups by functional and/or activity levels. Associations between disability severity and Pap smear use were inconsistent across the publications. Mammography screening fell as disability level increased according to three of the five studies. Results demonstrated modestly lower screening, but also were inconsistent for clinical breast examinations across studies. CONCLUSION: Evidence is inconsistent concerning disparities in these important cancer screening services with increasing disability levels. Published studies used differing methods and definitions, adding to concerns about the evidence for screening disparities rising along with increasing disability. More focused research is required to determine whether significant disparities exist in cancer screening among women with differing disability levels. This information is essential for national and local public health and health care organizations to target interventions to improve care for women with disabilities. |
Activities of daily living, chronic medical conditions, and health-related quality of life in older adults
Barile JP , Thompson WW , Zack MM , Krahn GL , Horner-Johnson W , Haffer SC . J Ambul Care Manage 2012 35 (4) 293-304 This study investigated associations between chronic medical conditions, activities of daily living (ADL), and health-related quality of life (HRQOL). Our findings suggest that the number of ADL limitations reported by older adults is associated with their HRQOL. Findings from our analyses also suggest that the association between having multiple comorbid conditions and HRQOL is stronger for those with no ADL limitations than those with at least some limitations. These data will aid practitioners in determining the relative importance of chronic medical conditions and ADL limitations on HRQOL and demonstrate how ADL limitations and comorbid conditions may differentially impact HRQOL. |
Detectable clonal mosaicism and its relationship to aging and cancer.
Jacobs KB , Yeager M , Zhou W , Wacholder S , Wang Z , Rodriguez-Santiago B , Hutchinson A , Deng X , Liu C , Horner MJ , Cullen M , Epstein CG , Burdett L , Dean MC , Chatterjee N , Sampson J , Chung CC , Kovaks J , Gapstur SM , Stevens VL , Teras LT , Gaudet MM , Albanes D , Weinstein SJ , Virtamo J , Taylor PR , Freedman ND , Abnet CC , Goldstein AM , Hu N , Yu K , Yuan JM , Liao L , Ding T , Qiao YL , Gao YT , Koh WP , Xiang YB , Tang ZZ , Fan JH , Aldrich MC , Amos C , Blot WJ , Bock CH , Gillanders EM , Harris CC , Haiman CA , Henderson BE , Kolonel LN , Le Marchand L , McNeill LH , Rybicki BA , Schwartz AG , Signorello LB , Spitz MR , Wiencke JK , Wrensch M , Wu X , Zanetti KA , Ziegler RG , Figueroa JD , Garcia-Closas M , Malats N , Marenne G , Prokunina-Olsson L , Baris D , Schwenn M , Johnson A , Landi MT , Goldin L , Consonni D , Bertazzi PA , Rotunno M , Rajaraman P , Andersson U , Freeman LE , Berg CD , Buring JE , Butler MA , Carreon T , Feychting M , Ahlbom A , Gaziano JM , Giles GG , Hallmans G , Hankinson SE , Hartge P , Henriksson R , Inskip PD , Johansen C , Landgren A , McKean-Cowdin R , Michaud DS , Melin BS , Peters U , Ruder AM , Sesso HD , Severi G , Shu XO , Visvanathan K , White E , Wolk A , Zeleniuch-Jacquotte A , Zheng W , Silverman DT , Kogevinas M , Gonzalez JR , Villa O , Li D , Duell EJ , Risch HA , Olson SH , Kooperberg C , Wolpin BM , Jiao L , Hassan M , Wheeler W , Arslan AA , Bueno-de-Mesquita HB , Fuchs CS , Gallinger S , Gross MD , Holly EA , Klein AP , LaCroix A , Mandelson MT , Petersen G , Boutron-Ruault MC , Bracci PM , Canzian F , Chang K , Cotterchio M , Giovannucci EL , Goggins M , Hoffman Bolton JA , Jenab M , Khaw KT , Krogh V , Kurtz RC , McWilliams RR , Mendelsohn JB , Rabe KG , Riboli E , Tjønneland A , Tobias GS , Trichopoulos D , Elena JW , Yu H , Amundadottir L , Stolzenberg-Solomon RZ , Kraft P , Schumacher F , Stram D , Savage SA , Mirabello L , Andrulis IL , Wunder JS , Patiño García A , Sierrasesúmaga L , Barkauskas DA , Gorlick RG , Purdue M , Chow WH , Moore LE , Schwartz KL , Davis FG , Hsing AW , Berndt SI , Black A , Wentzensen N , Brinton LA , Lissowska J , Peplonska B , McGlynn KA , Cook MB , Graubard BI , Kratz CP , Greene MH , Erickson RL , Hunter DJ , Thomas G , Hoover RN , Real FX , Fraumeni JF Jr , Caporaso NE , Tucker M , Rothman N , Pérez-Jurado LA , Chanock SJ . Nat Genet 2012 44 (6) 651-8 ![]() In an analysis of 31,717 cancer cases and 26,136 cancer-free controls from 13 genome-wide association studies, we observed large chromosomal abnormalities in a subset of clones in DNA obtained from blood or buccal samples. We observed mosaic abnormalities, either aneuploidy or copy-neutral loss of heterozygosity, of >2 Mb in size in autosomes of 517 individuals (0.89%), with abnormal cell proportions of between 7% and 95%. In cancer-free individuals, frequency increased with age, from 0.23% under 50 years to 1.91% between 75 and 79 years (P = 4.8 x 10(-8)). Mosaic abnormalities were more frequent in individuals with solid tumors (0.97% versus 0.74% in cancer-free individuals; odds ratio (OR) = 1.25; P = 0.016), with stronger association with cases who had DNA collected before diagnosis or treatment (OR = 1.45; P = 0.0005). Detectable mosaicism was also more common in individuals for whom DNA was collected at least 1 year before diagnosis with leukemia compared to cancer-free individuals (OR = 35.4; P = 3.8 x 10(-11)). These findings underscore the time-dependent nature of somatic events in the etiology of cancer and potentially other late-onset diseases. |
Examining functional content in widely used Health-Related Quality of Life scales
Hall T , Krahn GL , Horner-Johnson W , Lamb G . Rehabil Psychol 2011 56 (2) 94-9 PURPOSE: Assess extent to which generic Quality of Life (QOL) and Health-Related Quality of Life (HRQOL) scales include function in assessment of health, and identify health assessment items that are free of functional content. METHODS: An expert panel on measurement of health and disability reached consensus on definitions of health, disability, and function. They assessed all items of all generic (non-condition-specific) scales in the 2006 ProQolid database for being important to measuring health as distinct from function. Ratings were summarized as content validity ratios. Retained items were written into standard format and reviewed again by the expert panel and a validity panel with expertise in specific disabilities. RESULTS: Of 85 scales, 21 were retained as containing items important for assessing health. Scales ranged from 100% (BRFSS HRQOL, WHO-5) to only 4% of items rated as important. In further review of "important" items, functional content was identified in many of the items, particularly with regard to mental functioning. CONCLUSIONS: Popular generic scales of QOL and HRQOL vary greatly in the degree to which they include content on function. A pool of items can be identified that are relatively free of function. Distinguishing measurement of function and health is particularly important for people with long-standing functional limitations and for assessing the relationship of health with function. |
Structure of health-related quality of life among people with and without functional limitations
Horner-Johnson W , Suzuki R , Krahn GL , Andresen EM , Drum CE . Qual Life Res 2010 19 (7) 977-84 PURPOSE: The objective of this study was to assess the factor structure of nine health-related quality of life (HRQOL) survey items among people with and without disabilities or functional limitations (FL) and determine whether factor loadings were similar for the two groups. METHODS: Data were from US states and territories in the 2001 and 2002 Behavioral Risk Factor Surveillance System (BRFSS). Confirmatory factor analyses assessed fit of the data to a previously found factor structure. RESULTS: A two-factor structure was confirmed, conceptually representing physical and mental health. Although this structure fit data for both people with and without FL, factor loadings were significantly different for the two groups. In all but one instance, factor loadings were higher for people with FL than for people without FL. CONCLUSIONS: Results suggest that people with and without FL conceptualize physical and mental HRQOL similarly. However, the nine items analyzed appear to be a better reflection of the latent constructs of physical and mental HRQOL in the population of people with FL than those without FL. |
Fruit and vegetable intakes are associated with lower risk of breast fibroadenomas in Chinese women
Nelson ZC , Ray RM , Wu C , Stalsberg H , Porter P , Lampe JW , Shannon J , Horner N , Li W , Wang W , Hu Y , Gao D , Thomas DB . J Nutr 2010 140 (7) 1294-301 Fibroadenomas are common benign breast conditions among women and account for approximately 50% of breast biopsies performed. Dietary factors are known to influence benign breast conditions in the aggregate, but little is known of their association specifically with fibroadenoma. Our objective in this study was to evaluate the association between dietary and other factors and fibroadenoma risk. A case-control study, nested in a randomized trial of breast self-examination (BSE) in Chinese textile workers in Shanghai, China, was conducted between 1989 and 2000. The study sample included 327 affected women and 1070 controls. Women were administered a FFQ and a questionnaire that elicited reproductive and gynecological history and other information. Odds ratios, as estimates of relative risks, were calculated using multivariate conditional logistic regression. Significant decreasing trends in risk of fibroadenoma were observed with intake of fruits and vegetables and with number of live births, and a reduced risk was also associated with natural menopause, oral contraceptive use, and moderate exercise (walking and gardening). Increased risk of fibroadenoma was associated with heavy physical activity in one's 20s, breast cancer in a first-degree relative, and a history of prior benign breast lumps; and significant increasing trends in risk were observed with numbers of BSE per year and years of education. In conclusion, a diet rich in fruits and vegetables and the use of oral contraceptives may reduce risk of fibroadenoma. |
Differential performance of SF-36 items in healthy adults with and without functional limitations
Horner-Johnson W , Krahn GL , Suzuki R , Peterson JJ , Roid G , Hall T . Arch Phys Med Rehabil 2010 91 (4) 570-5 OBJECTIVE: To determine whether Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) items show differential item functioning among healthy adults with various types of functional limitations as compared with a healthy sample with no identified limitations. DESIGN: Survey responses were analyzed by using partial correlations. SETTING: General community. PARTICIPANTS: Participants (N=206) included (1) adults with spinal cord injury (SCI), (2) adults who were deaf or hard of hearing, (3) adults who were legally blind, (4) adults with psychiatric or emotional conditions, and (5) adults with no reported functional limitations. Participants were screened to ensure the absence of substantial health problems. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: SF-36. RESULTS: Partial correlations showed a significant negative correlation, indicating differential item functioning (ie, apparent bias) for people with SCI on all 10 SF-36 Physical Functioning items. For people who were blind, 5 items showed a significant negative correlation. Two items had significant negative correlations for the deaf/hard-of-hearing group. One item showed significant negative performance for people with mental health conditions. CONCLUSIONS: Our data indicated a possibility for measurement bias caused by the blending of health and function concepts in the SF-36. |
- Page last reviewed:Feb 1, 2024
- Page last updated:Mar 21, 2025
- Content source:
- Powered by CDC PHGKB Infrastructure